A pre-filled component

Abstract

The utility model provides a pre-filling component, which can significantly prevent bubbles carried in the pre-filling liquid from entering the pre-filling component again by improving the structure of the pre-filling component, thereby ensuring the life safety of the patient. The pre-filling component includes a container, the container has a top wall and a bottom wall, the bottom wall is connected to a drainage pipeline and a return pipeline, the pre-filling liquid in the container can flow unidirectionally from the drainage pipeline to the return pipeline, and the top wall is connected to an exhaust pipeline; a partition is provided in the middle of the container to divide it into a first flow channel and a second flow channel, the top end of the partition is spaced from the top wall, and the bottom end is spaced from the bottom wall; the drainage pipeline is provided on the side where the first flow channel is located, and the return pipeline is provided on the side where the second flow channel is located.

Description

Technical Field

[0001] The utility model relates to the technical field of extracorporeal membrane oxygenation systems, in particular to a pre-filling component. Background Art

[0002] Extracorporeal membrane oxygenation (ECMO) is an advanced medical technology that is widely used in the treatment of patients with severe cardiopulmonary failure. This technology provides patients with continuous respiratory and circulatory support through extracorporeal devices, thereby maintaining the patient's vital signs. The ECMO system usually consists of key parts such as pipelines, oxygenators, blood pumps, and monitoring systems. In practical applications, in order to ensure the effective operation of the ECMO system and the safety of patients, sufficient priming must be performed before connecting the patient to the ECMO system. The priming process mainly involves filling the ECMO circuit with a suitable priming fluid such as saline to remove the gas in the circuit and prevent the gas from entering the patient's body with the blood, causing serious consequences such as gas embolism. This step is of great significance for gaining precious life-saving time and ensuring the success of treatment.

[0003] However, the existing priming technology can easily cause bubbles in the priming fluid to re-enter the ECMO circuit. Once these bubbles enter the patient's body, they may cause life-threatening complications such as air embolism, seriously affecting the treatment effect and the patient's life safety.

[0004] Therefore, how to improve the ECMO circuit priming technology and effectively prevent bubbles from entering the ECMO circuit has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a pre-filling component, which can significantly prevent bubbles carried in the pre-filling liquid from entering the component to be pre-filled again by improving the structure of the pre-filling component, thereby ensuring the life safety of the patient.

[0006] To achieve the above-mentioned purpose, the utility model provides a pre-filling component, which includes a container, and the container has a top wall and a bottom wall, the bottom wall is connected to a drainage pipeline and a return pipeline, the pre-filling liquid in the container can flow unidirectionally from the drainage pipeline to the return pipeline, and the top wall is connected to an exhaust pipeline; a partition is provided in the middle of the container to divide it into a first flow channel and a second flow channel, the top end of the partition is spaced from the top wall, and the bottom end is spaced from the bottom wall; the drainage pipeline is arranged on the side where the first flow channel is located, and the return pipeline is arranged on the side where the second flow channel is located.

[0007] In the technical solution of the present application, a gap is formed between the top of the partition and the top wall of the container, and a gap is formed between the bottom of the partition and the bottom wall of the container, so that the top and bottom of the first flow channel and the second flow channel are correspondingly connected, and at the same time, the unidirectional flow of the pre-filled liquid is ensured by allowing the pre-filled liquid to flow unidirectionally from the discharge pipeline to the return pipeline; in this way, when the pre-filled liquid from the component to be pre-filled flows back to the container through the return pipeline, it can be blocked by the partition into the second flow channel, and the pre-filled liquid flowing back into the second flow channel is a gas-liquid mixture carrying a large number of bubbles, which is separated by gravity in the second flow channel, and the bubbles will gradually move upward and escape from the liquid to the top of the container, while the bubble-free liquid will remain at the bottom of the container, and this part of the liquid will enter the first flow channel through the gap between the partition and the bottom wall, thereby circulating again to pre-fill the device to be pre-filled, thereby significantly preventing the bubbles carried in the pre-filled liquid from entering the component to be pre-filled again, thereby ensuring the life safety of the patient.

[0008] Optionally, the pre-filled component is adapted to the component to be pre-filled, and the return liquid pipeline is provided with a one-way valve, which is provided between the pre-filled outlet of the component to be pre-filled and the container. By providing a one-way valve in the return liquid pipeline, it is possible to ensure that the pre-filled liquid flows from the discharge pipeline to the return liquid pipeline in one direction, thereby preventing the pre-filled liquid in the container from flowing back through the return liquid pipeline; in addition, the structure of the pre-filled component is simplified by providing a one-way valve.

[0009] Optionally, the return liquid pipeline is provided with a first switch, and in the circulation direction of the pre-filled liquid, the one-way valve is provided downstream of the first switch. The pre-filled component is adapted to the component to be pre-filled, and the discharge liquid pipeline is provided with a second switch, and the second switch is provided between the pre-filled inlet of the component to be pre-filled and the container.

[0010] By setting the first switch and the second switch to connect and cut off the return liquid pipeline and the discharge liquid pipeline, the possibility of manual control over the circulation of the pre-filled liquid is increased, and a more convenient pipeline circulation and cutoff control method for the pre-filled component is achieved.

[0011] Optionally, the partition is a plate-like structure having a top surface, a bottom surface, and a side wall surface connected between the top surface and the bottom surface; wherein the side wall surface is fixedly attached to a portion of the inner wall of the corresponding side of the container. In this way, the middle portion of the container can be divided into the first flow channel and the second flow channel, and the top and bottom of the first flow channel and the second flow channel are correspondingly connected.

[0012] Optionally, the container is made of a flexible material, and the middle parts of the container are connected to form a connection area, which serves as the partition. By connecting the flexible material, the method of additionally setting a partition is avoided, and the middle part of the container can be divided into two flow channels by processing the container itself. This processing method is simpler and can significantly reduce the cost of the pre-filled component.

[0013] Optionally, a cross-sectional dimension of the second flow channel is smaller than 1 / 2 of a cross-sectional dimension of the container and larger than a cross-sectional dimension of the liquid return pipeline.

[0014] Optionally, the distance between the bottom end of the partition and the bottom wall is less than 1 / 4 of the height of the container, and the distance between the bottom end of the partition and the bottom wall is greater than the cross-sectional size of the liquid return pipeline. By adopting the method that the distance between the bottom end of the partition and the bottom wall is less than 1 / 4 of the height of the container, the speed of the liquid entering the first flow channel from the second flow channel can be controlled, thereby ensuring that the gas-liquid mixture in the second flow channel can fully achieve gas-liquid separation. In addition, the distance between the bottom end of the partition and the bottom wall is greater than the cross-sectional size of the liquid return pipeline, thereby ensuring that the maximum flow rate of the pre-filled liquid entering the first flow channel from the second flow channel is greater than the flow rate of the pre-filled liquid entering the second flow channel from the liquid return pipeline, thereby avoiding the continuous increase of the liquid level in the second flow channel causing the liquid to enter the first flow channel from the top of the partition.

[0015] Optionally, the distance between the top of the partition and the top wall is less than 1 / 4 of the height of the container and greater than the cross-sectional size of the liquid return pipeline. In the technical solution of the present application, the distance between the top of the partition and the top wall is less than 1 / 4 of the height of the container, so that the partition can be extended to a higher position in the height direction toward the top wall, thereby preventing the pre-filled liquid in the second flow channel from flowing into the first flow channel from the top of the second flow channel, and avoiding the problem of the gas-liquid mixture entering the first flow channel without separation to participate in the pre-filling cycle; in addition, the distance between the top of the partition and the top wall is greater than the cross-sectional size of the liquid return pipeline, thereby ensuring that the gas separated from the gas-liquid mixture is quickly and evenly distributed at the top of the container, and discharged through the exhaust pipeline, to prevent the gas from re-merging into the pre-filled liquid.

[0016] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0018] Figure 1It is a structural schematic diagram of a pre-filling component in an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the connection between the pre-charged component and the component to be pre-charged.

[0020] Reference numerals:

[0021] 1- container; 1a- top wall; 1b- bottom wall; 21, first tube clamp; 22, second tube clamp; 23, third tube clamp; 3- drainage pipeline; 5- support plate; 6- return pipeline; 7- one-way valve; 8- partition; 81- first flow channel; 82- second flow channel; 9- hanging plate; 10- hanging hole; 11- bottle insertion needle; 12- exhaust pipeline; 13- graduation line; 151- first quick-connect connector; 152, second quick-connect connector; 16- venous pipeline; 17- centrifugal pump; 18- oxygenator; 19- arterial pipeline. DETAILED DESCRIPTION

[0022] The utility model provides a pre-filling component, which can significantly prevent air bubbles carried in the pre-filling liquid from entering the component to be pre-filled again by improving the structure of the pre-filling component, thereby ensuring the life safety of the patient.

[0023] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0025] The existing pre-filling assembly includes a containing bag, and a partition plate is also provided inside the containing bag. However, the bottom end of the partition plate is connected to the wall portion of the bottom side of the containing bag, and the top end thereof is spaced apart from the wall portion of the top side of the containing bag, so that the inside of the containing bag is divided into two separate chambers separated at the bottom but spaced apart at the top, one chamber is a reflux chamber, and the other is a pre-filling chamber. The reflux chamber is connected to a return liquid pipeline, and the pre-filling chamber is connected to a drainage pipeline. In this way, when the pre-filling liquid flows back from the drainage pipeline through the component to be pre-filled to the return liquid pipeline, it will first fill the reflux chamber and enter the pre-filling chamber through the gap between the partition plate and the wall portion of the top side.

[0026] In the prior art, a baffle is also provided in the pre-filling chamber, and the baffle is spaced apart from the partition plate, and the top end of the baffle is connected to the wall portion of the top side of the containing bag, while the bottom end is spaced apart from the wall portion of the bottom side of the containing bag. In this way, the pre-filling liquid that enters the pre-filling chamber through the gap between the partition plate and the top side wall portion will first fall into the left side of the baffle plate, that is, the area between the baffle plate and the partition plate, and then flow into the right side of the baffle plate through the gap between the bottom end of the baffle plate and the bottom side wall portion, and circulate again through the drainage pipe into the pre-filled part for the pre-filling operation.

[0027] In order to prevent the bubbles carried in the pre-filled liquid from entering the pre-filled component again, this application provides another structure of the pre-filled component, please refer to Figure 1 and Figure 2 , Figure 1 It is a structural schematic diagram of a pre-filling component in an embodiment of the utility model; Figure 2 It is a structural schematic diagram of the connection between the pre-charged component and the component to be pre-charged.

[0028] The utility model provides a pre-filling component, which comprises a containing part 1. The bottom of the containing part 1 is used for containing pre-filling liquid, and the top of the containing part 1 is used for containing gas separated from the pre-filling liquid.

[0029] The container 1 has a top wall 1a and a bottom wall 1b. The top wall 1a mentioned here is not limited to the wall portion located at the highest position of the container 1, and especially when the container 1 is an irregular structure, it also includes the side wall portion located at the top in the height direction of the container 1. Similarly, the bottom wall 1b, in addition to the wall portion located at the lowest position of the container 1, also includes the side wall portion located at the bottom in the height direction of the container 1. Here, the top and bottom extend in the height direction and are located on both sides of the middle of the container 1 in the height direction.

[0030] The top wall 1 a is connected to an exhaust pipe 12 , and the gas at the top of the container 1 can be discharged to the outside through the exhaust pipe 12 .

[0031] The bottom wall 1 b is connected with a liquid discharge pipeline 3 and a liquid return pipeline 6 . The pre-filled liquid in the container 1 flows out of the container 1 through the liquid discharge pipeline 3 , flows through the component to be pre-filled, and then flows back to the container 1 through the liquid return pipeline 6 .

[0032] The pre-filled liquid in the container 1 can flow unidirectionally from the discharge pipeline 3 to the return pipeline 6, and a partition 8 is provided in the middle of the container 1 to divide it into a first flow channel 81 and a second flow channel 82. The first flow channel 81 and the second flow channel 82 can be equal-diameter flow channels or trumpet-shaped flow channels, s-shaped flow channels or other special-shaped flow channels. The shapes of these flow channels all fall within the protection scope of this patent.

[0033] The top of the partition 8 is spaced from the top wall 1a, and the bottom is spaced from the bottom wall 1b. That is, the top and bottom of the first flow channel 81 are connected through the gaps on the corresponding sides. The discharge pipeline 3 is arranged on the side where the first flow channel 81 is located, and the return pipeline 6 is arranged on the side where the second flow channel 82 is located.

[0034] Specifically, as shown in the example, the first flow channel 81 is projected in the height direction to form a first projection, the second flow channel 82 is projected to form a second projection, the return liquid pipeline 6 is located in the area where the second projection is located, and the discharge liquid pipeline 3 is located in the area where the first projection is located.

[0035] In the above scheme, as an example, the partition 8 is a plate-like structure, which has a top end surface, a bottom end surface, and four side wall surfaces connected between the top end surface and the bottom end surface; wherein two opposite side wall surfaces are fitted and fixed to the inner wall of the corresponding side of the container 1. In this way, the middle part of the container 1 can be divided into the first flow channel 81 and the second flow channel 82, while the top and bottom of the first flow channel 81 and the second flow channel 82 are correspondingly connected. Of course, if the partition 8 is a triangle, a prism or a cylinder, the side wall of the partition 8 can be fitted and fixed to the inner wall of the container 1.

[0036] As another example, the container 1 is made of a flexible material, and the middle parts of the container 1 are connected to form a connection area, which serves as a partition 8. By connecting the flexible material, it is avoided to set up an additional partition 8, and the middle part of the container 1 can be divided into two flow channels by processing the container 1 itself. This processing method is simpler and can significantly reduce the cost of the pre-filled component.

[0037] In the technical solution of the present application, a gap is formed between the top of the partition 8 and the top wall 1a of the container 1, and a gap is formed between the bottom of the partition 8 and the bottom wall 1b of the container 1, so that the top and bottom of the first flow channel 81 and the second flow channel 82 are correspondingly connected, and at the same time, the unidirectional flow of the pre-filled liquid is ensured by allowing the pre-filled liquid to flow unidirectionally from the discharge pipeline 3 to the return pipeline 6; in this way, when the pre-filled liquid from the component to be pre-filled flows back to the container 1 through the return pipeline 6, it can be blocked by the partition to the second flow channel 82, The pre-filled liquid that flows back into the second flow channel 82 is a gas-liquid mixture carrying a large number of bubbles. The gas-liquid mixture is separated by gravity in the second flow channel 82. The bubbles will gradually move upward and escape from the liquid to the top of the container 1, while the bubble-free liquid will remain at the bottom of the container 1. This part of the liquid will enter the first flow channel 81 through the gap between the partition 8 and the bottom wall 1b, thereby circulating again to pre-fill the device to be pre-filled, thereby significantly preventing the bubbles carried in the pre-filled liquid from entering the component to be pre-filled again, thereby ensuring the patient's life safety.

[0038] In some more specific embodiments, the pre-filled component is adapted to the component to be pre-filled, and the component to be pre-filled includes a centrifugal pump 17 and an oxygenator that are connected to each other. Compared with the oxygenator 18, the centrifugal pump 17 is closer to the side governed by the drainage pipeline 3. The centrifugal pump 17 is connected to the drainage pipeline 3 through the venous pipeline 16, and the oxygenator 18 is connected to the return liquid pipeline 6 through the arterial pipeline 19.

[0039] The return liquid pipeline 6 is provided with a one-way valve 7, which is provided between the pre-fill outlet of the component to be pre-filled and the container 1. That is, the one-way valve 7 is provided on one side of the arterial pipeline 19. By providing the one-way valve 7 on the return liquid pipeline 6, it is possible to ensure that the pre-fill liquid flows from the discharge pipeline 3 to the return liquid pipeline 6 in one direction, thereby preventing the pre-fill liquid in the container 1 from flowing back through the return liquid pipeline 6; in addition, the structure of the pre-fill component is simplified by providing the one-way valve 7.

[0040] In an optional embodiment, the return liquid pipeline 6 is provided with a first switch, and the one-way valve 7 is provided downstream of the first switch in the circulation direction of the pre-filled liquid. The pre-filled component is adapted to the component to be pre-filled, and the discharge liquid pipeline 3 is provided with a second switch, which is provided between the pre-filled inlet of the component to be pre-filled and the container 1. The first switch and the second switch can be pipe clamps or other switch structures.

[0041] By providing the first switch and the second switch to connect and disconnect the return liquid pipeline 6 and the discharge liquid pipeline 3, the possibility of manual control over the circulation of the pre-filled liquid is increased, and a more convenient control method for the circulation and disconnection of the pipelines of the pre-filled component is achieved.

[0042] In the above solution, the cross-sectional dimension of the second flow channel 82 is smaller than 1 / 2 of the cross-sectional dimension of the container 1 and larger than the cross-sectional dimension of the return liquid pipeline 6. The cross-sectional dimension is the radial dimension of the cross section formed by radially cutting along the return liquid pipeline 6 or the second flow channel 82.

[0043] As an example, the distance between the bottom end of the partition 8 and the bottom wall 1b is less than 1 / 4 of the height of the container 1, and the distance between the bottom end of the partition 8 and the bottom wall 1b is greater than the cross-sectional size of the liquid return pipeline 6. By adopting the method that the distance between the bottom end of the partition 8 and the bottom wall 1b is less than 1 / 4 of the height of the container 1, the speed of the liquid entering the first flow channel 81 from the second flow channel 82 can be controlled, thereby ensuring that the gas-liquid mixture in the second flow channel 82 can fully achieve gas-liquid separation. In addition, the distance between the bottom end of the partition 8 and the bottom wall 1b is greater than the cross-sectional size of the liquid return pipeline 6, thereby ensuring that the allowable flow rate of the pre-filled liquid entering the first flow channel 81 from the second flow channel 82 is greater than the flow rate of the pre-filled liquid entering the second flow channel 82 from the liquid return pipeline 6.

[0044] As another example, the distance between the top of the partition 8 and the top wall 1a is less than 1 / 4 of the height of the container 1, and is greater than the cross-sectional size of the liquid return line 6. In the technical solution of the present application, the distance between the top of the partition 8 and the top wall 1a is less than 1 / 4 of the height of the container 1, so that the partition 8 can be extended to a higher position in the height direction toward the top wall 1a, thereby preventing the pre-filled liquid in the second flow channel 82 from flowing from the top of the second flow channel 82 into the first flow channel 81, and avoiding the problem that the gas-liquid mixture enters the first flow channel 81 without separation to participate in the pre-filling cycle; in addition, the distance between the top of the partition 8 and the bottom wall 1b is greater than the cross-sectional size of the liquid return line 6, thereby ensuring that the gas separated from the gas-liquid mixture is quickly and evenly distributed at the top of the container 1, and discharged through the exhaust line 12, to prevent the gas from re-merging into the pre-filled liquid.

[0045] In each of the above-mentioned embodiments, the inner diameters of the liquid discharge line 3 and the liquid return line 6 are respectively the same as the inner diameters of the corresponding venous line 16 and the arterial line 19, thereby increasing the priming speed.

[0046] As a more specific embodiment, the exhaust pipe 12 is connected with a bottle insertion needle 11, which can be quickly connected to the storage device of the pre-filled liquid and introduce the pre-filled liquid into the container 1. The exhaust pipe 12 is provided with a first pipe clamp 21. A hanging plate 9 is provided above the container 1, and a hanging hole 10 is provided on the hanging plate 9. The hanging plate 9 can prevent the problem of ventilation or liquid filling caused by the folding of the upper half of the container 1. A partition 8 is provided on the side of the bag body close to the return liquid pipe 6. The partition 8 and the left side of the container 1 form a second flow channel 82. The gas-liquid mixture entering the container 1 from the return liquid pipe 6 is flushed into the second flow channel 82 by the water flow, and the gas-liquid mixture is separated by gravity. The pre-filled liquid enters the first flow channel 81 from the bottom of the partition 8 and participates in the circulation. The gas passes from the top of the partition 8 and is discharged from the exhaust pipe 12.

[0047] There is a scale line 13 on the container 1, and the lowest pre-filled liquid level should be higher than the bottom of the partition 8. The return liquid pipeline 6 and the discharge liquid pipeline 3 are both equipped with quick-connect connectors and pipe clamps, and the quick-connect connectors can be quickly connected to the extracorporeal circulation pipeline. Among them, the quick-connect connector located in the return liquid pipeline 6 is the first quick-connect connector 151, and the pipe clamp located in the return liquid pipeline 6 is the second pipe clamp 22. The quick-connect connector located in the discharge liquid pipeline 3 is the second quick-connect connector 152, and the third pipe clamp 23 is located in the discharge liquid pipeline 3. There is a one-way valve 7 on the return liquid pipeline 6, and the pre-filled liquid can only flow from the return liquid pipeline 6 to the container 1. During pre-filling, the container 1 is filled with pre-filled liquid. Due to the presence of the one-way valve 7, the pre-filled liquid can only flow out from the discharge liquid pipeline 3. The pre-filled liquid quickly pre-fills the extracorporeal circulation pipeline by gravity, and the gas and the pre-filled liquid return to the container 1 through the return liquid pipeline 6. There is a support plate 5 at the bottom of the container 1 to prevent the container 1 from bending and causing poor circulation and introducing new bubbles.

[0048] When in use, the second quick-connect connector 152 is used to connect the discharge line 3 of the container 1 to the venous line 16 of the pump head of the centrifugal pump 17, and the return line 6 to the arterial line 19 behind the oxygenator 18, so as to form a circulation loop. The third tube clamp 23 on the discharge line 3 is closed, and the bottle insertion needle 11 is inserted into the physiological saline bag prepared in advance, and the physiological saline is canned into the container 1, and then the first tube clamp 21 on the exhaust line 12 is closed, and the container 1 is suspended. The third tube clamp 23 on the discharge line 3 is opened, and due to gravity and pressure difference, the physiological saline quickly flows out of the discharge line 3 and pre-fills into the extracorporeal circulation pipeline, and carries the gas in the extracorporeal circulation pipeline from the return line 6 into the second flow channel 82, completing gas-liquid separation. The centrifugal pump 17 is turned on to form a circulation loop, and the microbubbles are also brought out to complete gas-liquid separation in the second flow channel 82. The first tube clamp 21 on the exhaust line 12 is opened to discharge the gas in the container 1. When all the gas in the ECMO pipeline is discharged, the centrifugal pump 17 is stopped, the drainage pipeline 3 and the return pipeline 6 are closed, the first quick-connector 151 and the second quick-connector 152 at both ends are unplugged, and the two corresponding quick-connectors on the ECMO pipeline are connected, and the pre-charging is completed.

[0049] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A pre-filled component, characterized in that: The pre-filling assembly comprises a container (1), the container (1) having a top wall (1a) and a bottom wall (1b), the top wall (1a) being connected to an exhaust pipe (12), the bottom wall (1b) being connected to a liquid discharge pipe (3) and a liquid return pipe (6), the pre-filling liquid in the container (1) being able to flow out through the liquid discharge pipe (3) and flow back into the container (1) through the liquid return pipe (6); A partition (8) is provided in the middle of the container (1) to divide the container (1) into a first flow channel (81) and a second flow channel (82); the top end of the partition (8) is spaced apart from the top wall (1a), and the bottom end is spaced apart from the bottom wall (1b); The liquid discharge pipeline (3) is arranged on the side where the first flow channel (81) is located, and the liquid return pipeline (6) is arranged on the side where the second flow channel (82) is located.

2. The prefill component according to claim 1, characterized in that: The liquid return pipeline (6) is provided with a one-way valve (7).

3. The pre-filled assembly according to claim 2, characterized in that: The partition (8) has a top end surface, a bottom end surface, and a side wall surface connected between the top end surface and the bottom end surface; Wherein, at least part of the side wall surface is fitted and fixed to part of the inner wall of the container (1).

4. The pre-filled assembly according to claim 2, characterized in that: The container (1) is made of a flexible material, and the middle parts of the container (1) are connected to form a connection area, and the connection area serves as the partition (8).

5. The pre-filled assembly according to claim 2, characterized in that: The liquid return pipeline (6) is provided with a first switch, and the one-way valve (7) is provided downstream of the first switch in the flow direction of the pre-filled liquid.

6. The pre-filled assembly according to any one of claims 1 to 5, characterized in that: The cross-sectional dimension of the second flow channel (82) is smaller than 1 / 2 of the cross-sectional dimension of the container (1), and larger than the cross-sectional dimension of the liquid return pipeline (6).

7. The pre-filled component according to any one of claims 1 to 5, characterized in that: The distance between the bottom end of the partition (8) and the bottom wall (1b) is less than 1 / 4 of the height of the container (1) and is greater than the cross-sectional size of the liquid return pipeline (6).

8. The pre-filled assembly according to any one of claims 1 to 5, characterized in that: The distance between the top end of the partition (8) and the top wall (1a) is less than 1 / 4 of the height of the container (1) and is greater than the cross-sectional size of the liquid return pipeline (6).

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